Question about Stanley Bostitch N80CB Coil Framing Nailer

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How to remove trigger valve - Stanley Bostitch N80CB Coil Framing Nailer

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See the link below. Please post any additional questions that you may have.

Thanks,
Dan

Link: http://www.fixya.com/support/r5812776-bostitch_nailgun_dis_assembly_assembly

Posted on Aug 31, 2010

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1 Answer

With 90 # air and PC nails. When I pull the trigger nothing happens. No air noise, no nailing, no movement - just dead. It's been oiled every use.


Most likely stuck trigger valve. Easy to check. Remove nails, remove trigger to expose the firing pin of trigger valve. Connect air and very quickly depress the firing pin all the way in. If the gun fires , adjust the safety to depress the trigger valve completely. If the gun does not fire, replace firing valve, or remove and check /lube o-rings in valve. Good luck

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1 Answer

My husky framing nailer leaks air around trigger


Leak around trigger could be trigger valve internal orings or orings on the outside of the trigger valve making contact against the body of the gun. Spray soapy water to determine where the air is leaking from. If air is leaking around the outside of the valve, most likely the orings were cut upon installation of the valve. If leaking from internal valve, most likely worn or broken oring; easy to fix if you have a source for orings.

To remove the trigger valve for service or inspection (take close-up photo of trigger area for reference ):
disconnect airline, remove nails, remove trigger retainer pin, remove trigger, remove roll pin /s holding trigger valve in place (use 3mm punch to remove retainer roll pins which are located in the body of the gun just above the trigger valve). With retainer pin/s removed and with gloved hand (under trigger valve), apply air pressure to gun to blow out the trigger valve (use lower pressure to push out trigger valve because it could come out with force.). With trigger valve in hand notice that there are two slots or groove cut neer top of the valve where the retainer pins rest, you will need to reinstall valve into body with slots aligned to retainer pins. Remove retainer pins holding trigger together to pull out internal valve. Good luck and post again if your have other question about the trigger valve.

Nov 15, 2012 | Air Tools & Compressors

1 Answer

How can i disassemble the trigger


Bostitch coil nailers use (usually, many generic valves) a TVA6 trigger valve. To gain access to the valve is easy (remove nails). Remove the pin/screw holding the actual trigger to reveal the trigger valve. Just above the trigger valve on the body of the gun, notice one or two roll pins that you need to punch out using a 3mm punch. With roll pins removed the valve can be pushed out with air pressure. With gloved hand or thick rag, apply pressure to gun and catch valve (using caution because the valve can come out with force (try reducing pressue to gun ). Notice that there are notches in the valve that must align with roll pins when you reinstall the valve. With valve in hand remove two roll pins and push out the center spool. Usual problems with trigger valve are very small leak due to worn orings and plastic parts or large leak due to split/failed oring. Generic valves work ok and cost about 15 ~ 18 dollars on ebay. Good luck

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How do u disassemble the trigger of n60fn


Bostitch coil nailers use (usually, many generic valves) a TVA6 trigger valve. To gain access to the valve is easy (remove nails). Remove the pin/screw holding the actual trigger to reveal the trigger valve. Just above the trigger valve on the body of the gun, notice one or two roll pins that you need to punch out using a 3mm punch. With roll pins removed the valve can be pushed out with air pressure. With gloved hand or thick rag, apply pressure to gun and catch valve (using caution because the valve can come out with force (try reducing pressue to gun ). Notice that there are notches in the valve that must align with roll pins when you reinstall the valve. With valve in hand remove two roll pins and push out the center spool. Usual problems with trigger valve are very small leak due to worn orings and plastic parts or large leak due to split/failed oring. Generic valves work ok and cost about 15 ~ 18 dollars on ebay. Good luck

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1 Answer

Hey, I'm having trouble with my Dewalt 18ga Brad Nailer trigger. Can you send me the directions you have on how to get into this thing? I'd really appreciate it.


For removal of dewalt D51238k trigger valve. Remove the nails.
Remove the pin holding the trigger in place. Then remove two roll pins in the body of the gun just above the trigger (3mm roll pins). With gloved hand, apply air pressure to the gun which will pop out the trigger valve. Use caution because the valve could come out with force. Try with low pessure first, then increase as needed. If you are removing the trigger because the gun will not fire, (only puff of air from trigger area), suspect problem in the head valve instead (usually, trigger valve is bad if air leaks from trigger when you connect air ). Good luck

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1 Answer

Leaking air through trigger area. Will not nail at all.


The trigger valve has seven orings. The oring kit may not include all orings needed. To replace the trigger valve, remove nails, remove the rollpin holding the trigger with 3mm driver to expose the trigger valve. Next remove one or two roll pins holding the trigger valve in the body of the gun. Apply air pressure to gun and catch the valve with gloved hand (use caution because the valve may come out with force). Note the position of the valve in the body of the gun in relation to the roll pins. If the firing pin seems loose in the body of the valve, replace the whole valve(could be # tva6 cost about 20 dollars on ebay). Good luck

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1 Answer

Hello, there is air coming from the trigger area, I suspect there is some kind of o-ring or some kind of seal broken where the trigger goes into the piston area, I just want to know how to take that apart...


Trigger valve is part number A08368 or (old part #897458). Easy repair. Remove air supply hose, and nails. Remove pin holding trigger to expose trigger valve. Spray soapy water on valve to determin if air is leaking from outer part of valve (orings that contact the body) or around the pin. Remove roll pin/s holding trigger valve in body of gun (use 3mm pin driver, some guns have one pin others 2). With pins removed, apply air pressure to gun and valve will pop out (use heavy glove or rag in hand to catch valve because some valves come out with force). With trigger valve in hand notice the two groves on sides of valve that roll pins contact (when you re-insert valve align valve so groves align with roll pin in body). Remove the two pins holding inner workings of trigger valve. There are two orings on the trigger pin, three orings on the inner valve and two orings on the outer part of body of valve. Usually, the orings that cause leak are the two smallest on trigger pin and three on the inner valve (unless soapy water test indicates outer orings). Orings are available at dewalt service center by part number or if you like to tinker, Lowes has many usefull orings in the plumbing department or replace the whole valve for about $25. Use plenty of silicone paste lube on the orings (sold at lowes). Valve should press in without a great deal of force and be sure to align valve to roll pin in the body. Use 3mm punch to temp. hold valve in gun for test. Good luck

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NV65ah Hitachi nail gun "how do you remove the trigger piston"??


If you do not have a breakdown of the gun go here www.toolpartsdirect.com and select brand, then select coil nailer, finally look for your model number. With breakdown, find parts labeled 51 thru 54. The trigger pin (#53) and the retaining ring (#21) hold the trigger. Remove these then remove the trigger. Find several #51 roll pins on the gun and punch out the uppermost pin where the trigger valve is located (3mm size). The uppermost rollpin holds the trigger valve in-place. After you have removed the rollpin/s connect air supply to pop-out the trigger valve. Caution, use a heavy glove (or reduce pressure) to catch valve as it can come out with force. When incerting the rebuilt valve, use caution not to cut new orings as the valve is pushed in. Good luck and email if you have more questions.

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1 Answer

N80sb-1 stanley bostitch framing gun.


Yes your nailer will drive other sizes of nails. For info and parts go to www.bostitch.com and look for the support tab then select service parts. Here you will find parts list and manual. To remove the tva11 trigger valve remove the retainer pin (the pin is 3mm) for the trigger and remove trigger. Next remove roll pin/pins that retain trigger valve. Use heavy glove to catch trigger valve as you apply air pressure to gun. The valve could pop out with great force so try lowering the pressure to gun. Before installing the new valve, check the opening for sharp edges which will cut orings. Good Luck and email if you have more questions.

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